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Finding the Fourth Proportional to 80,711.03, 111,384.82 and 67,259.77

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Solution

The fourth proportional to 80,711.03, 111,384.82 and 67,259.77 is: 92,821.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,711.03 : 111,384.82 = 67,259.77 : x
  2. Step 2: Convert to fraction form
    80,711.03/111,384.82 = 67,259.77/x
  3. Step 3: Cross multiply
    80,711.03x = 111,384.82 × 67,259.77
  4. Step 4: Simplify right side
    80,711.03x = 7,491,717,180.30
  5. Step 5: Solve for x
    x = 7,491,717,180.30/80,711.03
  6. Step 6: Final answer
    x = 92,821.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.